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    Genetic diversity in cocoa germplasm of southern Cameroon revealed by simple sequences repeat (SSRS) markers

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    Автор
    Efombagn, M.I.
    Sounigo, O.
    Nyassé, S.
    Dauleux, M.M.
    Cilas, C.
    Eskes, M.A.
    Allen, K.
    Дата
    2006
    Language
    en
    Type
    Journal Article
    Review status
    Peer Review
    Accessibility
    Open Access
    Metadata
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    Citation
    Efombagn, M.I., Sounigo, O., Nyassé, S., Dauleux, M.M., Cilas, C., Eskes, M.A. & Allen, K. (2006). Genetic diversity in cocoa germplasm of southern Cameroon revealed by simple sequences repeat (SSRs) markers. African Journal of Biotechnology, 5(16), 1441-1449.
    Permanent link to cite or share this item: http://hdl.handle.net/10568/91407
    Аннотации
    The range of polymorphism of about 194 cocoa accessions collected in farms in Southern Cameroon during field surveys and 71 Trinitario and Upper Amazon clones available in genebanks on-station was assessed using 13 SSR markers. The gene diversity, genetic differentiation and genetic similarities were analysed for the different populations. In total, 282 alleles were detected within all the populations studied. The farm accessions were strongly differentiated based on their geographical origin, with accessions coming from the East province clustering together with local Trinitario accessions from the genebank. Accessions from the Centre-South provinces clustered with Amazon and hybrid accessions, suggesting more uptake of seed garden materials in farms in these provinces. The genetic diversity parameters indicate that the farmers’ planting material is not highly diverse, and is genetically close to parental genotypes available in genebanks. However, some promising Upper Amazon clones (T-clones) that have also been used as parents of released hybrid varieties were genetically distant from the accessions. This result suggests that the progenies of these parents have so far been poorly used in the cocoa farms surveyed. The consequences of these findings for cocoa breeding in Cameroon are discussed.
    CGIAR Affiliations
    Climate Change, Agriculture and Food Security
    AGROVOC Keywords
    COCOA; SSR MARKERS; POLYMORPHISM; AGRONOMIC TRAITS; BREEDING; GENETIC; GENEBANKS
    Тематика
    PLANT BREEDING; COCOA; MARKETS; AGRIBUSINESS; DOMESTIC TRADE; SMALLHOLDER FARMERS; FARM MANAGEMENT; NUTRITION; PLANT PRODUCTION; CROP HUSBANDRY; FOOD SECURITY; HANDLING, TRANSPORT, STORAGE AND PROTECTION OF AGRICULTURAL PRODUCTS; DISEASES CONTROL; LIVELIHOODS; PESTS OF PLANTS
    Countries
    CAMEROON; FRANCE; NIGERIA
    Regions
    AFRICA; ACP; CENTRAL AFRICA; EUROPE; WEST AFRICA
    Investors/sponsors
    International Institute of Tropical Agriculture
    Collections
    • IITA Journal Articles [1984]

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